VSB (VESTIGIAL SIDEBAND MODULATION)

This is the digital modulation technique that the ATSC has chosen for use in terrestrial transmission of digital television signals. There are several variations. Broadcasters are using an 8-VSB approach, providing about 19.5 Mbps of data. Cable companies have developed a 16-VSB system that also operates in the standard 6 MHz TV channel bandwidth, but provides nearly twice the data rate capability.